1. A working model of the primitive Earth;Cloud;Am. J. Sci.,1972
2. J.C.G. Walker, C. Klein, M. Sachidlowski, J.W. Schopf, D.J. Stevenson, M.R. Walter, Environmental evolution of the Archean–Early Proterozoic Earth, in: J.W. Schopf (Ed.), Earth’s Earliest Biosphere – Its Origin and Evolution, Princeton University Press, Princeton, NJ, 1983, pp. 260–290.
3. Paleosols and the evolution of atmospheric oxygen; a critical review;Rye;Am. J. Sci.,1998
4. Evidence of pre-2.2 Ga paleosols for the early evolution of atmospheric oxygen and terrestrial biota;Ohmoto;Geology,1996
5. 3.26 Ga black smoker-type mineralization in the Strelley Belt, Pilbara Craton, Western Australia;Vearncombe;J. Geol. Soc. Lond.,1995